1/*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#ifndef _MANIFEST_INFO_H
27#define _MANIFEST_INFO_H
28
29#include <sys/types.h>
30#include "jni.h"
31
32/*
33 * Zip file header signatures
34 */
35#define SIGSIZ 4 /* size of all header signatures */
36
37#define PKZIP_SIGNATURE_AT(p, b2, b3) \
38 (((p)[0] == 'P') & ((p)[1] == 'K') & ((p)[2] == b2) & ((p)[3] == b3))
39#define CENSIG_AT(p) PKZIP_SIGNATURE_AT(p, 1, 2)
40#define LOCSIG_AT(p) PKZIP_SIGNATURE_AT(p, 3, 4)
41#define ENDSIG_AT(p) PKZIP_SIGNATURE_AT(p, 5, 6)
42#define EXTSIG_AT(p) PKZIP_SIGNATURE_AT(p, 7, 8)
43#define ZIP64_ENDSIG_AT(p) PKZIP_SIGNATURE_AT(p, 6, 6)
44#define ZIP64_LOCSIG_AT(p) PKZIP_SIGNATURE_AT(p, 6, 7)
45
46/*
47 * Header sizes including signatures
48 */
49#define LOCHDR 30
50#define EXTHDR 16
51#define CENHDR 46
52#define ENDHDR 22
53
54#define ZIP64_ENDHDR 56 // ZIP64 end header size
55#define ZIP64_LOCHDR 20 // ZIP64 end loc header size
56#define ZIP64_EXTHDR 24 // EXT header size
57#define ZIP64_EXTID 1 // Extra field Zip64 header ID
58
59#define ZIP64_MAGICVAL 0xffffffffLL
60#define ZIP64_MAGICCOUNT 0xffff
61
62/*
63 * Header field access macros
64 */
65#define CH(b, n) (((unsigned char *)(b))[n])
66#define SH(b, n) (CH(b, n) | (CH(b, n+1) << 8))
67#define LG(b, n) ((SH(b, n) | (SH(b, n+2) << 16)) &0xffffffffUL)
68#define LL(b, n) (((jlong)LG(b, n)) | (((jlong)LG(b, n+4)) << 32))
69#define GETSIG(b) LG(b, 0)
70
71/*
72 * Macros for getting local file (LOC) header fields
73 */
74#define LOCVER(b) SH(b, 4) /* version needed to extract */
75#define LOCFLG(b) SH(b, 6) /* general purpose bit flags */
76#define LOCHOW(b) SH(b, 8) /* compression method */
77#define LOCTIM(b) LG(b, 10) /* modification time */
78#define LOCCRC(b) LG(b, 14) /* crc of uncompressed data */
79#define LOCSIZ(b) LG(b, 18) /* compressed data size */
80#define LOCLEN(b) LG(b, 22) /* uncompressed data size */
81#define LOCNAM(b) SH(b, 26) /* filename length */
82#define LOCEXT(b) SH(b, 28) /* extra field length */
83
84/*
85 * Macros for getting extra local (EXT) header fields
86 */
87#define EXTCRC(b) LG(b, 4) /* crc of uncompressed data */
88#define EXTSIZ(b) LG(b, 8) /* compressed size */
89#define EXTLEN(b) LG(b, 12) /* uncompressed size */
90
91/*
92 * Macros for getting central directory header (CEN) fields
93 */
94#define CENVEM(b) SH(b, 4) /* version made by */
95#define CENVER(b) SH(b, 6) /* version needed to extract */
96#define CENFLG(b) SH(b, 8) /* general purpose bit flags */
97#define CENHOW(b) SH(b, 10) /* compression method */
98#define CENTIM(b) LG(b, 12) /* modification time */
99#define CENCRC(b) LG(b, 16) /* crc of uncompressed data */
100#define CENSIZ(b) LG(b, 20) /* compressed size */
101#define CENLEN(b) LG(b, 24) /* uncompressed size */
102#define CENNAM(b) SH(b, 28) /* length of filename */
103#define CENEXT(b) SH(b, 30) /* length of extra field */
104#define CENCOM(b) SH(b, 32) /* file comment length */
105#define CENDSK(b) SH(b, 34) /* disk number start */
106#define CENATT(b) SH(b, 36) /* internal file attributes */
107#define CENATX(b) LG(b, 38) /* external file attributes */
108#define CENOFF(b) LG(b, 42) /* offset of local header */
109
110/*
111 * Macros for getting end of central directory header (END) fields
112 */
113#define ENDNMD(b) SH(b, 4) /* number of this disk */
114#define ENDDSK(b) SH(b, 6) /* disk number of start */
115#define ENDSUB(b) SH(b, 8) /* number of entries on this disk */
116#define ENDTOT(b) SH(b, 10) /* total number of entries */
117#define ENDSIZ(b) LG(b, 12) /* central directory size */
118#define ENDOFF(b) LG(b, 16) /* central directory offset */
119#define ENDCOM(b) SH(b, 20) /* size of zip file comment */
120
121/*
122 * Macros for getting Zip64 end of central directory header fields
123 */
124#define ZIP64_ENDLEN(b) LL(b, 4) /* size of zip64 end of central dir */
125#define ZIP64_ENDVEM(b) SH(b, 12) /* version made by */
126#define ZIP64_ENDVER(b) SH(b, 14) /* version needed to extract */
127#define ZIP64_ENDNMD(b) LG(b, 16) /* number of this disk */
128#define ZIP64_ENDDSK(b) LG(b, 20) /* disk number of start */
129#define ZIP64_ENDTOD(b) LL(b, 24) /* total number of entries on this disk */
130#define ZIP64_ENDTOT(b) LL(b, 32) /* total number of entries */
131#define ZIP64_ENDSIZ(b) LL(b, 40) /* central directory size in bytes */
132#define ZIP64_ENDOFF(b) LL(b, 48) /* offset of first CEN header */
133
134/*
135 * Macros for getting Zip64 end of central directory locator fields
136 */
137#define ZIP64_LOCDSK(b) LG(b, 4) /* disk number start */
138#define ZIP64_LOCOFF(b) LL(b, 8) /* offset of zip64 end */
139#define ZIP64_LOCTOT(b) LG(b, 16) /* total number of disks */
140
141/*
142 * A comment of maximum length of 64kb can follow the END record. This
143 * is the furthest the END record can be from the end of the file.
144 */
145#define END_MAXLEN (0xFFFF + ENDHDR)
146
147/*
148 * Supported compression methods.
149 */
150#define STORED 0
151#define DEFLATED 8
152
153/*
154 * Information from the CEN entry to inflate a file.
155 */
156typedef struct zentry { /* Zip file entry */
157 size_t isize; /* size of inflated data */
158 size_t csize; /* size of compressed data (zero if uncompressed) */
159 jlong offset; /* position of compressed data */
160 int how; /* compression method (if any) */
161} zentry;
162
163/*
164 * Information returned from the Manifest file by the ParseManifest() routine.
165 * Certainly (much) more could be returned, but this is the information
166 * currently of interest to the C based Java utilities (particularly the
167 * Java launcher).
168 */
169typedef struct manifest_info { /* Interesting fields from the Manifest */
170 char *manifest_version; /* Manifest-Version string */
171 char *main_class; /* Main-Class entry */
172 char *jre_version; /* Appropriate J2SE release spec */
173 char jre_restrict_search; /* Restricted JRE search */
174 char *splashscreen_image_file_name; /* splashscreen image file */
175} manifest_info;
176
177/*
178 * Attribute closure to provide to manifest_iterate.
179 */
180typedef void (*attribute_closure)(const char *name, const char *value,
181 void *user_data);
182
183/*
184 * Function prototypes.
185 */
186int JLI_ParseManifest(char *jarfile, manifest_info *info);
187void *JLI_JarUnpackFile(const char *jarfile, const char *filename,
188 int *size);
189void JLI_FreeManifest(void);
190
191JNIEXPORT int JNICALL
192JLI_ManifestIterate(const char *jarfile, attribute_closure ac,
193 void *user_data);
194
195#endif /* _MANIFEST_INFO_H */
196